Black hole cosmology [1]}, [2]}, [3]}, [4]}, [5]} can also explain the existence of a cosmological-scale axis. Since stars spin, black holes also spin based on the spin of the stars from which they were created [6]}. If the Universe is hosted in a black hole, the Universe should have a preferred direction inherited from its host black hole [7]}, [3]}, [9]}, which would exhibit itself in the form of an axis [10]}. Such black hole universe might not be aligned with the cosmological principle [11]}, but can explain other observations such as dark energy and the agreement between the Hubble radius and the cosmological Schwarzschild radius.
